Ideal Incompressible Water Is Flowing in a Drainage Channel of Rectangular

Multiple Choice

Ideal incompressible water is flowing in a drainage channel of rectangular cross-section.At one point,the width of the channel is 12 m,the depth of water is 6.0 m,and the speed of the flow is 2.5 m/s.At a point downstream,the width has narrowed to 9.0 m,and the depth of water is 8.0 m.What is the speed of the flow at the second point?

A) 2.0 m/s
B) 2.5 m/s
C) 3.0 m/s
D) 3.5 m/s
E) 4.0 m/s